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这是原始代码块及其结果：

代码：

if os.path.isdir(top):
    for root, dirs, files in os.walk(top, topdown = True):
        for dirname in dirs:
            print 'Dirname = ', os.path.join(root, dirname)

结果：

Dirname = ../output/.svn
Dirname = ../output/a random folder
Dirname = ../output/a random folder - copy
Dirname = ../output/.svn\pristine
Dirname = ../output/.svn\temp
Dirname = ../output/.svn\pristine\04
Dirname = ../output/.svn\pristine\59
Dirname = ../output/a random folder\another one inside
Dirname = ../output/a random folder\another one inside - Copy
Dirname = ../output/a random folder\another one inside - Copy (2)

现在我想忽略所有隐藏的文件夹和子文件夹。这是修改后的代码及其结果：

代码：

if os.path.isdir(top):
    for root, dirs, files in os.walk(top, topdown = True):
        for dirname in dirs:
            print 'Dirname = ', os.path.join(root, dirname)
            if dirname.startswith('.'):
                dirs.remove(dirname)

结果：

Dirname = ../output/.svn
Dirname = ../output/a random folder - copy
Dirname = ../output/a random folder\another one inside
Dirname = ../output/a random folder\another one inside - Copy
Dirname = ../output/a random folder\another one inside - Copy (2)

我不明白的是：为什么 ../output/a random 文件夹不再列出？

4

1 回答 1

6

迭代时不应修改可迭代对象。在这种情况下，您正在修改迭代dirs的循环内部。fordirs

试试这个：

if os.path.isdir(top):
    for root, dirs, files in os.walk(top, topdown = True):
        dirs_to_ignore = []
        for dirname in dirs:
            print 'Dirname = ', os.path.join(root, dirname)
            if dirname.startswith('.'):
                dirs_to_ignore.append(dirname)
        for dirname in dirs_to_ignore:
            dirs.remove(dirname)

另请参阅：迭代时修改列表

于 2012-02-29T18:28:30.897 回答